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104 lines
3.4 KiB
104 lines
3.4 KiB
'use strict'; |
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var clear = require('es5-ext/array/#/clear') |
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, eIndexOf = require('es5-ext/array/#/e-index-of') |
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, setPrototypeOf = require('es5-ext/object/set-prototype-of') |
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, callable = require('es5-ext/object/valid-callable') |
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, validValue = require('es5-ext/object/valid-value') |
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, d = require('d') |
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, ee = require('event-emitter') |
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, Symbol = require('es6-symbol') |
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, iterator = require('es6-iterator/valid-iterable') |
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, forOf = require('es6-iterator/for-of') |
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, Iterator = require('./lib/iterator') |
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, isNative = require('./is-native-implemented') |
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, call = Function.prototype.call |
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, defineProperties = Object.defineProperties, getPrototypeOf = Object.getPrototypeOf |
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, MapPoly; |
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module.exports = MapPoly = function (/*iterable*/) { |
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var iterable = arguments[0], keys, values, self; |
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if (!(this instanceof MapPoly)) throw new TypeError('Constructor requires \'new\''); |
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if (isNative && setPrototypeOf && (Map !== MapPoly)) { |
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self = setPrototypeOf(new Map(), getPrototypeOf(this)); |
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} else { |
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self = this; |
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} |
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if (iterable != null) iterator(iterable); |
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defineProperties(self, { |
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__mapKeysData__: d('c', keys = []), |
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__mapValuesData__: d('c', values = []) |
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}); |
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if (!iterable) return self; |
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forOf(iterable, function (value) { |
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var key = validValue(value)[0]; |
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value = value[1]; |
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if (eIndexOf.call(keys, key) !== -1) return; |
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keys.push(key); |
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values.push(value); |
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}, self); |
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return self; |
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}; |
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if (isNative) { |
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if (setPrototypeOf) setPrototypeOf(MapPoly, Map); |
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MapPoly.prototype = Object.create(Map.prototype, { |
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constructor: d(MapPoly) |
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}); |
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} |
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ee(defineProperties(MapPoly.prototype, { |
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clear: d(function () { |
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if (!this.__mapKeysData__.length) return; |
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clear.call(this.__mapKeysData__); |
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clear.call(this.__mapValuesData__); |
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this.emit('_clear'); |
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}), |
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delete: d(function (key) { |
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var index = eIndexOf.call(this.__mapKeysData__, key); |
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if (index === -1) return false; |
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this.__mapKeysData__.splice(index, 1); |
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this.__mapValuesData__.splice(index, 1); |
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this.emit('_delete', index, key); |
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return true; |
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}), |
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entries: d(function () { return new Iterator(this, 'key+value'); }), |
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forEach: d(function (cb/*, thisArg*/) { |
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var thisArg = arguments[1], iterator, result; |
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callable(cb); |
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iterator = this.entries(); |
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result = iterator._next(); |
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while (result !== undefined) { |
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call.call(cb, thisArg, this.__mapValuesData__[result], |
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this.__mapKeysData__[result], this); |
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result = iterator._next(); |
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} |
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}), |
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get: d(function (key) { |
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var index = eIndexOf.call(this.__mapKeysData__, key); |
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if (index === -1) return; |
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return this.__mapValuesData__[index]; |
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}), |
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has: d(function (key) { |
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return (eIndexOf.call(this.__mapKeysData__, key) !== -1); |
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}), |
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keys: d(function () { return new Iterator(this, 'key'); }), |
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set: d(function (key, value) { |
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var index = eIndexOf.call(this.__mapKeysData__, key), emit; |
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if (index === -1) { |
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index = this.__mapKeysData__.push(key) - 1; |
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emit = true; |
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} |
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this.__mapValuesData__[index] = value; |
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if (emit) this.emit('_add', index, key); |
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return this; |
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}), |
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size: d.gs(function () { return this.__mapKeysData__.length; }), |
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values: d(function () { return new Iterator(this, 'value'); }), |
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toString: d(function () { return '[object Map]'; }) |
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})); |
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Object.defineProperty(MapPoly.prototype, Symbol.iterator, d(function () { |
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return this.entries(); |
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})); |
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Object.defineProperty(MapPoly.prototype, Symbol.toStringTag, d('c', 'Map'));
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